O and H111
Annealed or only lightly strain hardened. Softest condition with the best formability; used where the plate will be bent or rolled, or where toughness matters more than strength.
Flat rolled products
Aluminium Plate
Marine, structural, aerospace and tooling plate in 1xxx to 7xxx series alloys. Metline Industries supplies aluminium plate from Mumbai to fabricators, OEMs and project contractors across India and export markets, with the grade, temper and documentation your drawing calls for.
- Alloy series
- 1xxx, 2xxx, 3xxx, 5xxx, 6xxx, 7xxx
- Common tempers
- O, H111, H32, H116, H321, T6, T651, T7351
- Plate thickness
- From about 6 mm upwards
- Standards
- ASTM B209, EN 485, IS 736
Overview
What counts as aluminium plate
Aluminium plate is flat rolled aluminium that is thicker than sheet. Most specifications draw the line at roughly 6 mm (0.25 in): below that the product is sheet, above it the product is plate. The extra thickness changes how the material is made, stocked and used. Plate is hot rolled from a cast ingot, often stretched after heat treatment to relieve internal stress, and is usually bought to be machined, welded into structures or cut into heavy components rather than formed.
That is why choosing plate is mostly a question of three things: the alloy, which sets strength, corrosion resistance and weldability; the temper, which sets how the metal has been strengthened and how stable it will be when you machine it; and the thickness and size, which decide how much material you buy and how much you remove.
Choosing the right plate alloy
Every series trades strength against corrosion resistance, weldability and cost. Use this table to narrow the field, then open the grade page for detailed data.
| Alloy | Family | What it is good at | Typical uses |
|---|---|---|---|
| 1050 / 1060 | Commercially pure | Excellent corrosion resistance and conductivity, very easy to work; low strength | Chemical and food process equipment, reflectors, electrical parts |
| 3003 | Al–Mn | Moderate strength with good formability and weldability | Tanks, ducting, general fabrication |
| 5052 | Al–Mg | Good strength without heat treatment, very good resistance to marine atmospheres, weldable | Boat fittings, fuel tanks, truck and trailer bodies |
| 5083 | Al–Mg | Highest strength of the non-heat-treatable alloys, excellent seawater resistance, keeps toughness at very low temperatures | Ship hulls and decks, LNG and cryogenic tanks, pressure vessels |
| 5754 | Al–Mg | Balanced strength and formability, good corrosion resistance | Tread and floor plate, vehicle panels, welded structures |
| 6061 | Al–Mg–Si | The versatile all-rounder: heat treatable, weldable, machines well, good corrosion resistance | Machine parts, jigs and fixtures, frames, base plates |
| 6082 | Al–Mg–Si | Structural alloy widely specified to European standards; strong, weldable and machinable | Structural members, cranes, trailers, bridges |
| 2024 | Al–Cu | High strength and fatigue resistance; lower corrosion resistance, not normally welded | Aircraft structures, fittings, high-stress parts |
| 7075 | Al–Zn | Among the strongest aluminium alloys; excellent for precision machining; not suited to fusion welding | Aerospace components, moulds and tooling, high-load parts |
Need help choosing? Send us the application and the loads or environment it will see, and our team will recommend a grade and temper.
Typical mechanical properties
Typical room-temperature values for common plate grades. They are for comparison only. Guaranteed minimums depend on the standard and the plate thickness, and are confirmed on the mill test certificate.
| Alloy & temper | Tensile strength (MPa) | Yield strength (MPa) | Density (g/cm³) | Heat treatable |
|---|---|---|---|---|
| 5052-H32 | 228 | 193 | 2.68 | No |
| 5083-H116 | 317 | 228 | 2.66 | No |
| 6061-T651 | 310 | 276 | 2.70 | Yes |
| 2024-T351 | 469 | 324 | 2.78 | Yes |
| 7075-T651 | 572 | 503 | 2.81 | Yes |
What the temper code tells you
The letters and numbers after the alloy describe how the plate was strengthened. Getting the temper right matters as much as the alloy, especially for parts that will be heavily machined.
H32, H116 and H321
Strain hardened and stabilised tempers for 5xxx alloys. H116 and H321 are tested for resistance to exfoliation and intergranular corrosion, which is why shipbuilders specify them.
T6
Solution heat treated and artificially aged for full strength in 2xxx, 6xxx and 7xxx alloys.
T651
T6 plus controlled stretching to relieve residual stress. The plate stays flat and stable when you machine deep pockets, so it is the standard choice for machined parts, tooling and fixtures.
T351
Naturally aged and stress relieved by stretching. The usual supply condition for 2024 plate.
T7351
Over-aged 7xxx temper that gives up a little strength for much better resistance to stress corrosion cracking, used in critical aerospace parts.
Where aluminium plate is used
Marine and shipbuilding
Hulls, decks, superstructures and offshore equipment in 5083 and 5086, where seawater resistance and weldability come first.
Transport and vehicles
Trailer chassis, tipper bodies, rail car structures and tanker shells that need strength with less weight.
Aerospace and defence
Machined frames, ribs and fittings in 2024 and 7075, bought with full traceability and certification.
Moulds, tooling and machinery
Blow and injection moulds, jigs, fixtures and machine base plates in 6061 and 7075, where flatness and machinability save hours on the shop floor.
Construction and architecture
Structural brackets, cladding sub-frames, bridge decks and walkways that must resist weather for decades.
Process and electrical equipment
Chemical tanks, cryogenic vessels and conductive parts in pure and 5xxx alloys.
Sizes & processing
Sizes, finishing and documentation
Aluminium plate is usually supplied in standard mill sizes or cut to the dimensions you need. Availability depends on the alloy, temper and thickness, so share your full requirement and we will confirm what can be supplied and how quickly.
- Full mill plates or cut-to-size blanks
- Protective PE film on one or both faces where required
- Mill test certificates showing chemistry and mechanical properties
- Supply to ASTM, EN or IS specifications as stated on your order
- Export packing on seaworthy pallets for overseas shipments
Common commercial ranges
- Thickness
- 6 mm and above; heavier gauges on request
- Width
- Typically 1000 to 2500 mm
- Length
- Typically 2000 to 6000 mm
- Surface
- Mill finish; tread pattern available in selected alloys
- Packing
- Interleaved, strapped on timber pallets
Ranges vary by alloy and temper. Confirm your exact size when you enquire.
What to include in your enquiry
A complete enquiry gets you an accurate price and lead time on the first reply. Include as many of these as you can.
- Alloy and temperFor example 5083-H116 or 6061-T651.
- DimensionsThickness × width × length, and whether you need full plates or cut pieces.
- QuantityNumber of pieces or total weight, and whether delivery can be split.
- SpecificationThe standard and edition you buy to, plus any tolerance or flatness requirements.
- DocumentsMill test certificate, third-party inspection or other paperwork your customer needs.
- DeliveryDelivery city or port and the date you need the material.
One partner for every plate you buy
Every grade in one place
Pure, marine, structural and aerospace plate from a single supplier, so one purchase order covers a whole project.
Engineering-first advice
We talk alloy, temper and tolerance, not just price, and we tell you when a different grade will do the job better or for less.
Mumbai to anywhere
Headquartered in Mumbai, close to the Nhava Sheva (JNPT) port, we serve customers across India and ship plate to export markets.
Explore plate by grade
Aluminium plate questions
What thickness is considered aluminium plate?
Generally from about 6 mm (0.25 in) upwards. Thinner material is classed as sheet. The exact boundary depends on the standard, so state the standard you are buying to.
Which aluminium plate is best for marine use?
5083 is the usual first choice for hulls and decks because it combines high strength with excellent seawater resistance and good weldability. 5086 and 5052 are also widely used. For immersed or wetted structures, specify a marine temper such as H116 or H321.
What is the difference between 6061 and 7075 plate?
7075-T651 is roughly twice as strong in yield as 6061-T651 and is preferred for highly loaded machined parts and tooling. 6061 is easier to weld, more corrosion resistant and costs less, which makes it the better all-round choice for frames, fixtures and general engineering.
Why choose T651 instead of T6?
T651 plate has been stretched after heat treatment to relieve internal stress. It stays flat when material is machined away unevenly, which reduces distortion and rework on precision parts.
Can 5083 plate be heat treated for more strength?
No. 5083 is a non-heat-treatable alloy. Its strength comes from magnesium in solution and from strain hardening, which is why it is supplied in O, H111, H116 and H321 tempers.
Do you supply cut-to-size plate with mill certificates?
Yes. Tell us the sizes and the certification you need when you enquire, and we will confirm availability, lead time and documentation with our quote.
Need aluminium plate for your next project?
Send us the alloy, temper, sizes and quantity. Our Mumbai team will reply with availability, lead time and a competitive quote.
